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Windows 7: Backup to two targets

For many years I have been backing up Windows (data and system) to an external HDD using Windows Backup & Restore. I recently acquired a Network Attached Storage device (Synology) and decided to make a second backup to the NAS. I had planned to use Windows Backup & Restore for this, but ran into a problem: Windows assumes a SINGLE target. Each time I reconfigure the target it counts as a 'new' backup job, which requires a new full backup to be done.

Is there a workaround? Or must I use more sophisticated backup software? If so, what software do you recommend? I'm not a sophisticated user, so the simpler, the better. As far as features are concerned, all I need is the equivalent of Windows Backup & Restore plus the ability to handle multiple targets, no more and no less. Thanks!

Have you ever tried to copy a file to more than one location at a time? OS's (not just windows) aren't designed for that and that is essentially what you are trying to do. If you need a backup in another location you will have to do so manually.

Let me clarify my original post. I want make two backups (data and system image), certainly not at the same time, but rather one after the other. That way, I'll have a second backup in case one of the devices fails. Anyway, the first backup goes to an external HDD and another backup (done at a different time) goes to the NAS.

Let me clarify my original post. I want make two backups (data and system image), certainly not at the same time, but rather one after the other. That way, I'll have a second backup on a second device in case one of the devices fails. Anyway, one backup goes to an external HDD and the other (done at a different time!) goes to the NAS.

I created confusion when I said "Windows assumes a single target." Yes, of course Windows can only handle one target at a time. But when you edit the schedule and change the target in order to backup to a second device, Windows says "Ah, this must be a new backup" and it makes a full backup, rather than an incremental one. So as I keep alternating targets, I keep getting full backups.

Also with a differential you only need one or 2 to be sure. With incrementals you need all of them. It makes restores more complicated and cumulatively takes up more room compared to only keeping 1 or 2 differentials. IMO the only advantage to incrementals is if you need file versioning.